/* style.css for OptiPixel */

/*--------------------------------------------------------------
# Table of Contents
--------------------------------------------------------------
1. General & Variables
2. Typography
3. Navigation Bar
4. Main Sections & Wrappers
5. Drag & Drop Area
6. Image Preview Boxes
7. Controls & Forms
8. Buttons
9. Cards (Testimonials, Blog, etc.)
10. Accordion (FAQ)
11. Sidebar Widgets (Blog)
12. Footer
13. Animations & Transitions
14. Utility Classes
15. Page Specific Styles
    15.1. Bulk Compressor
    15.2. Image Converter
    15.3. Tutorial Page
    15.4. Policy Pages (Privacy, Terms)
    15.5. Contact Page
--------------------------------------------------------------*/

/* 1. General & Variables
--------------------------------------------------------------*/
:root {
    --primary-color: #007bff; /* Bootstrap Blue - Vibrant */
    --primary-hover-color: #0056b3;
    --secondary-color: #17a2b8; /* Bootstrap Info - Tealish */
    --secondary-hover-color: #117a8b;
    --success-color: #28a745; /* Bootstrap Success Green */
    --danger-color: #dc3545; /* Bootstrap Danger Red */
    --warning-color: #ffc107; /* Bootstrap Warning Yellow */
    --info-color: #17a2b8;
    --light-bg: #f8f9fa;
    --dark-text: #212529;
    --muted-text: #6c757d;
    --border-color: #dee2e6;
    --card-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    --card-hover-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.15);
    --border-radius: 0.375rem; /* Bootstrap's default is often .25rem or .375rem */
    --font-family-sans-serif: 'Poppins', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sans-serif);
    color: var(--dark-text);
    background-color: #fff; /* Or a very light off-white like #fefefe */
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden; /* Prevent horizontal scroll */
    /* Optional: Subtle page load fade-in */
    animation: fadeInPage 0.5s ease-out forwards;
}

/* 2. Typography
--------------------------------------------------------------*/
h1, h2, h3, h4, h5, h6 {
    font-weight: 600; /* Semi-bold for headings */
    color: var(--dark-text);
    margin-bottom: 0.75rem;
}

.display-5, .display-6 {
    font-weight: 700; /* Bolder for display headings */
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

a:hover {
    color: var(--primary-hover-color);
    text-decoration: underline;
}

.lead {
    font-weight: 400;
}

/* 3. Navigation Bar
--------------------------------------------------------------*/
.navbar {
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
    background-color: #ffffff !important; /* Ensure it's white */
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.navbar-brand img {
    transition: transform 0.3s ease;
}
.navbar-brand:hover img {
    transform: rotate(-5deg) scale(1.05);
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: color 0.2s ease;
}

.navbar-nav .nav-link.active,
.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

.navbar-toggler {
    border: none;
}
.navbar-toggler:focus {
    box-shadow: none;
}

.dropdown-menu {
    border: 1px solid var(--border-color);
    box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.08);
    border-radius: var(--border-radius);
}
.dropdown-item {
    font-weight: 500;
    padding: 0.5rem 1rem;
}
.dropdown-item:hover, .dropdown-item:focus {
    background-color: var(--primary-color);
    color: white;
}
.dropdown-item.active {
    background-color: var(--primary-color);
    color: white !important;
}


/* 4. Main Sections & Wrappers
--------------------------------------------------------------*/
main.container {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.compressor-wrapper,
.bulk-compressor-wrapper,
.image-converter-wrapper {
    background-color: #fff;
    border-radius: calc(var(--border-radius) * 2); /* Larger radius for main card */
    box-shadow: var(--card-shadow);
    overflow: hidden; /* To contain absolutely positioned elements if any */
}

section {
    padding: 3rem 0;
}

section.bg-light {
    padding: 4rem 1.5rem; /* More padding for distinct sections */
}


/* 5. Drag & Drop Area
--------------------------------------------------------------*/
.drag-area {
    border: 3px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem 1rem;
    text-align: center;
    cursor: pointer;
    background-color: var(--light-bg);
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

.drag-area i {
    transition: transform 0.3s ease;
}

.drag-area:hover {
    border-color: var(--primary-color);
    background-color: #eef6ff; /* Lighter primary */
}

.drag-area:hover i {
    transform: scale(1.1) translateY(-3px);
}

.drag-area.dragover { /* Class to be added by JS on dragover */
    border-color: var(--success-color);
    background-color: #e6ffed; /* Lighter success */
    box-shadow: 0 0 15px rgba(40, 167, 69, 0.3);
}

.drag-area p {
    margin-bottom: 0.5rem;
    color: var(--muted-text);
    font-weight: 500;
}
.drag-area p .text-primary {
    font-weight: 600;
}

/* 6. Image Preview Boxes
--------------------------------------------------------------*/
.image-box {
    min-height: 250px; /* Ensure consistent height */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fdfdfd;
}

.image-box canvas,
.image-box img {
    max-width: 100%;
    max-height: 250px; /* Control max preview size */
    height: auto;
    display: block;
    margin-left: auto;
    margin-right: auto;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 5px rgba(0,0,0,0.08);
}

.preview-placeholder { /* For the icon when no image is loaded */
    min-height: 150px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.preview-placeholder i {
    opacity: 0.3;
    font-size: 4rem; /* Larger placeholder icon */
}

/* 7. Controls & Forms
--------------------------------------------------------------*/
.controls-section {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}
.controls-section .form-label {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.form-range {
    cursor: pointer;
}
/* Attempt to style range slider thumb - browser support varies */
.form-range::-webkit-slider-thumb {
    background: var(--primary-color);
    border: 2px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}
.form-range::-moz-range-thumb {
    background: var(--primary-color);
    border: 2px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}
.form-range::-ms-thumb {
    background: var(--primary-color);
    border: 2px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}

.form-control, .form-select {
    border-radius: var(--border-radius);
    border-color: #ced4da; /* Softer border */
    transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.25);
}

/* 8. Buttons
--------------------------------------------------------------*/
.btn {
    font-weight: 500;
    padding: 0.6rem 1.25rem;
    border-radius: var(--border-radius);
    transition: all 0.2s ease-in-out;
    letter-spacing: 0.5px;
}
.btn-lg {
    padding: 0.8rem 1.75rem;
    font-size: 1.1rem;
}
.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.875rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: var(--primary-hover-color);
    border-color: var(--primary-hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 123, 255, 0.2);
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}
.btn-success:hover {
    background-color: #1e7e34;
    border-color: #1e7e34;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(40, 167, 69, 0.2);
}

.btn-outline-danger:hover {
    transform: translateY(-2px);
}

.btn-social { /* For social media icons on contact page etc. */
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border-radius: 50%;
}

/* 9. Cards (Testimonials, Blog, etc.)
--------------------------------------------------------------*/
.card {
    border: none; /* Remove default border if using shadows */
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: transform 0.25s ease-out, box-shadow 0.25s ease-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
}

.card.blog-post-card .card-img-top {
    height: 200px;
    object-fit: cover;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.testimonial-card img.rounded-circle {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    padding: 3px;
}
.card-footer {
    background-color: var(--light-bg);
    border-top: 1px solid var(--border-color);
}

/* 10. Accordion (FAQ)
--------------------------------------------------------------*/
.accordion-item {
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius) !important; /* Override Bootstrap */
    overflow: hidden; /* To make border-radius work with button */
}
.accordion-button {
    font-weight: 500;
}
.accordion-button:not(.collapsed) {
    color: var(--primary-color);
    background-color: #e7f1ff;
    box-shadow: inset 0 -1px 0 rgba(0,0,0,.125);
}
.accordion-button:focus {
    z-index: 3;
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(var(--bs-primary-rgb), 0.25);
}
.accordion-button i {
    margin-right: 0.75rem;
}

/* 11. Sidebar Widgets (Blog)
--------------------------------------------------------------*/
.sidebar .widget {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 0.25rem 0.5rem rgba(0,0,0,0.05);
}
.sidebar .widget-title {
    font-size: 1.25rem;
    font-weight: 600;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem !important;
}
.sidebar .list-unstyled li a:hover {
    color: var(--primary-color);
}
.tag-cloud a {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    margin: 0.25rem;
    font-size: 0.9rem;
    border-radius: 50px; /* Pill shape */
    background-color: #e9ecef;
    color: var(--muted-text);
    text-decoration: none;
    transition: all 0.2s ease;
}
.tag-cloud a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

/* 12. Footer
--------------------------------------------------------------*/
footer.bg-dark {
    padding: 2.5rem 0;
    background-color: #262c33 !important; /* Darker footer */
}
footer .text-white-50 {
    transition: color 0.2s ease;
}
footer .text-white-50:hover {
    color: #fff !important;
}
footer .fab {
    font-size: 1.25rem;
}

/* 13. Animations & Transitions
--------------------------------------------------------------*/
@keyframes fadeInPage {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseIcon {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

.icon-interactive:hover {
    animation: pulseIcon 0.5s ease-in-out;
}

/* Example: spinner for loading states - can be used with JS */
.spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: text-bottom;
    border: .25em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-border .75s linear infinite;
    color: var(--primary-color); /* Default color */
}
@keyframes spinner-border {
  to { transform: rotate(360deg); }
}
.spinner.spinner-light { color: white; }
.spinner.spinner-sm { width: 1rem; height: 1rem; border-width: .2em;}


/* 14. Utility Classes
--------------------------------------------------------------*/
.fw-bold { font-weight: 700 !important; }
.fw-semibold { font-weight: 600 !important; }
.fw-medium { font-weight: 500 !important; }

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-info { color: var(--info-color) !important; }

.bg-primary-soft { background-color: #e7f1ff; } /* Soft primary background */
.bg-success-soft { background-color: #d4edda; }
.bg-danger-soft { background-color: #f8d7da; }

/* 15. Page Specific Styles
--------------------------------------------------------------*/

/* 15.1. Bulk Compressor */
#imageList .list-group-item {
    padding: 0.75rem 1.25rem;
    transition: background-color 0.2s ease;
}
#imageList .list-group-item:hover {
    background-color: var(--light-bg);
}
#imageList img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-right: 0.75rem;
}
.status-badge {
    min-width: 70px;
    text-align: center;
}
#overallProgressBarContainer .progress-bar {
    font-weight: 500;
    color: white;
}

/* 15.2. Image Converter */
#originalConverterImage, #convertedOutputImage {
    max-height: 280px !important; /* Adjust for converter layout */
}

/* 15.3. Tutorial Page */
.tutorial-page .list-group-item-action.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}
.tutorial-step-image { /* Already in HTML, just making sure it's styled if needed */
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin: 1rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* 15.4. Policy Pages (Privacy, Terms) */
.policy-header, .terms-header {
    background-color: var(--light-bg);
    padding: 3rem 0;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}
.policy-content h2, .terms-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}
.policy-content h2:first-of-type, .terms-content h2:first-of-type {
    margin-top: 0;
}
.policy-content h3, .terms-content h3 {
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
    font-weight: 600;
}

/* 15.5. Contact Page */
.contact-header {
    background-color: var(--light-bg);
    padding: 3rem 0;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}
.contact-info-item i {
    font-size: 1.25rem;
}


/* Responsive Adjustments (Bootstrap handles most, but you can add specifics) */
@media (max-width: 768px) {
    h1, .display-5 { font-size: 2.25rem; }
    h2, .display-6 { font-size: 1.75rem; }
    .drag-area { padding: 1.5rem 0.5rem; }
    .btn-lg { font-size: 1rem; padding: 0.7rem 1.5rem; }
    section { padding: 2rem 0; }
    .sidebar { margin-top: 2rem; }
}

@media (max-width: 576px) {
    .controls-section .row > div[class^="col-"] {
        margin-bottom: 1rem; /* Stack controls nicely on small screens */
    }
    .controls-section .row > div[class^="col-"]:last-child {
        margin-bottom: 0;
    }
}